Page 41 - Summary 6 2025
P. 41

Delta Modern Language Schools
Science department
Grade 6
1st term 2024- 2025

Change from liquid to gas                       Change from gas to liquid
(evaporation)                                   (condensation)

Evaporation (vaporization):                     Condensation:

It is the change of state of matter from        It is the change of state of matter from

liquid state to gas state.                      gas state to liquid state.
● On heating a liquid matter.
                                                ● On cooling a gas matter.
The thermal energy of molecules of liquid       The thermal energy of molecules of gas matter
matter increases.                               decreases.
●The force that holds these molecules           ●The force that holds these molecules together
together decreases so; they vibrate faster.     increases so; they vibrate slower.
●Molecules start to move away from each         ●Molecules start to get close together, so the
other, so the liquid matter vaporizes into gas  gas matter changes to liquid matter and this
matter and this process is called               process is called "condensation"
"evaporation".                                  Example: Water vapor changes to water.
Example: Water changes to water vapor.

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